Furnace.



| 9H5. 1 67,264. Patent-ed May 21, 1918.

2 SHEETS-SHEET l- J. L. PIERCE FURNACE.

APPLICATON FILED DC.28, 1916.

WITNESSES WW- fig ATTORNEYS UNITED STATES PATENT JAMES LOUIS PIERCE, 0P MANILA, PHILIPPINE IsLANDS, ASSIGNOR T0 PACIFIC COMMERCIAL ooMPANY, or MANILA, PHILIPPINE ISLANDS, A CORPORATION OF PHILIPPINE ISLANDS.

FURNACE.

To all whom it may concern:

Be it known that 1, J MES L, PIERCE, a citizen of the United States, and a resident of Manila, in the Philippine Islands, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates to furnaces, for dlfferent uses though having an especial adaptability for use with driers or evaporators, and the main object thereof is to utilize all the heat from the burning fuel by the provision of a novel arrangement of flues and partition plates whereby the heat of the fire gases is efiectively transferred to the air to be heated.

My invention is fully described in the following specification, of which the accompanying drawings form a part, in which like characters refer to like parts in each of the views, and in which Figure 1 is a longitudinal vertical section taken through one embodiment of my invention;

Fig. 2 is a transverse section taken on the line 2-2 of Fig. 1;

Fig. 3 is a section taken on the line 3-3 of Fig. 1, partly broken away;

Fig. 4 is a view of one of the baffle plates which I employ; and

Fig. 5 is a view of one of the fiues which I employ.

Referring to the drawings, 6 represents a housing, as of brick, having grate bars 7 in the fire-box 8 above the ash-pit 9, suitable doors 10 and 11 being provided covering the fuel and ash passages, said housing having a flue 12 at the top thereof branched to provide a chimney 13, controlled by a valve 14, and a pipe 15 having a fan 16 therein driven by any suitable means, not shown.

Extendin entirely across the furnace above the dre-box is a partition plate 17 having openings therethrough for a plurality of vertical fiues 18 leading to the smoke chamber at the top of the furnace and extending from opposite sides of the furnace to points somewhat beyond the central vertical plane of the furnace, as shown in Fig. 3, the oppositely directed flues 18 being staggered with respect to each other to form a tortuous path from one end of the furnace to the other.

The upper ends of the fines 18 pass Specification of Letters Patent.

Patented May 21, 1918.

' Application filed December 28, 1916. Serial No. 139,238.

through suitable openings in a partition plate 20 extending entirely across the furnace beneath the smoke chamber, and, from this construction, it will be seen that the products of combustion will pass upwardly to the smoke chamber but will not enter the space between the partition plates 17 and 20.

This space is divided into compartments 21, 22, and 23 by means of horizontal partitions 24, 25, and 26, an air intake pipe 27 connecting the compartment 21 with the outer air, and an exhaust pipe 28 leading from the compartment 23 to the point of use, a fan 29 being provided in the pipe 28 driven in any desired manner, not shown.

The partitions may be of sheet material and are formed of a plurality of plates 30, Fig. 4, cut away at opposite sides to fit the fiues 18 and being longitudinally channeled at opposite sides, as shown at 31, whereby alternate plates 30 will be reversed to engage with those between and only one type of the plate will be necessary except for the ends of the furnace, and I provide an opening 32 at the end of the bafile plate 24 opposite the intake pipe 27, and an opening 33 in the baflie plate 25 at the end opposite to the opening 32 whereby the air passing through said compartments must follow a tortuous path.

The pure air enters the compartment 21 through the intake 27 and follows a tortuous path around the fiues 18 to the opening 32, passes thence through the compartment 22 around the fiues 18 to the opening 33, and passes thence through the compartment 23 around the fines 18 to the exhaust pipe 28 and forced to the point of use by means of the fan 29, being heated in its passage through the several compartments.

The products of combustion pass through the fiues 18 to the smoke chamber and through the pipe '15 to the point of use but, if the use of the smoke and gases is not desired, the valve 14 may be opened to allow their escape to the outer air, the fan 16 being stopped in such event.

It will also be noted that, by means of my bafile plates 30, the size of the furnace may be increased or decreased by employing more or fewer of the said plates and of the flues 18, and the housing 6 may be made of metal for portable furnaces, if desired, and the number of the compartments may be increased or decreased to correspondingly affect the distance of travel of the air:

through the furnace and, accordingly, the

I claim as new, and desire to secure by Let-- ters Patent, is

In a furnace, the combination of a furnace body having a fire box at its bottom and an outlet space at its top, a plurality of horizontal partitions spaced apart between the said outlet space and the fire box, said partitions each being made of a plurality of sections arranged edge to edge in overlapping relation the meeting edges of the section's having recesses cooperating to il'oip ies' of this iii teii't may be bb t'ai il'd for-fire 'c'nts each, by addressing Washin ton, '11. '01

form elongated openings extending alternately from opposite wallsv of the furnace body, "and flat fiip'rfht fine's eitt'ending through the corresporf ing openings of the vpartitions having their ends open for gas to pass upwardly therethrough from the fire-box, said flues being staggered and extending alternately from opposite walls of the furnacebody and having their inner portions overlapping whereby a serpentine passage is formed between adjacent partitions, the partitions having openings a1ternately at o posite ends.

' JAMES Lorne I PIERCE;

ui tominssmner e: Patents; 

